In his first-ever interview, the sole Australian survivor of the Waco siege has revealed to 60 Minutes what really took place during the 51-day stand-off, and why he believes crazed cult leader David Koresh will one day return to Earth as the son of God.

Rinehart tried to save dying bodyguard

Ginia Rinehart, the daughter of Australian mining magnate Gina Rinehart, tried desperately to save her bodyguard's life after finding him hanging in a suite at an upmarket London hotel, a coroner's court has heard.

Former special forces soldier Jerry Rouwhorst, 35, took his own life on March 16 believing he had disgraced his friend and employer, Westminster's Coroners Court heard.

The night before Mr Rouwhorst's body was found the two had been out drinking until the early morning hours as a farewell celebration for Ms Rinehart, 27, who was about to fly home to Australia.

They had both been staying at the Dorchester Hotel – booked into separate hotel rooms but sharing an inter-connected sitting room.

After they returned to their hotel rooms, Mr Rouwhorst, who was unused to drinking heavily, sent Ms Rinehart a text message around 10.30am saying he was tendering his resignation because he had let her down and embarrassed her in front of her friends.

Coroner Shirley Radcliffe described the message as a "cry for help".

But the mining heiress did not see the message to around midday.

She then frantically tried to enter her bodyguard's room and remove the tie from around his neck before calling the front desk in a hysterical state.

It is believed he had tried to take his life about 15 minutes before he was found.

Ms Reinhart was so distressed she would later collapse in the hallway of the hotel.

Paramedics later found a faint pulse and rushed Mr Rouwhorst to hospital where he died a short time later.

The coroner has delivered an open verdict on the death by hanging, ruling that the level of alcohol in Mr Rouwhorst's system and his distressed text message meant she could not be sure he intended to kill himself.